I dont use anti-perspirant... i use a deodorant (i think the label actually says anti-odourant?) called TRUST, which i order from the Garden Pharmacy. It's a herbal, aluminium-free deodorant, which has no perfume or scent at all.
I have to reapply it every 5 days, but i know people who only have to use it every 10 - 12 days! It really does work (if you follow the instructions) and because you dont use it every day, it lasts ages. You will still perspire, but your sweat doesnt stink.
http://www.garden.co.uk/acatalog/THE_GARDEN_PHARMACY__SPECIALISED_DEODORANTS_27.html#a0103853***update*** Lush have recently brought out a deodorant (NOT an anti-perspirant) called Aromacreme... they've done deodorant for years, but they were in these powdery bars that feel kind of rough if they dry out a bit, and also gave me a slight rash.
But now they've brought out this cream, which smells GORGEOUS, which you smooth on with your fingers. I've been using it for a week now, and havent developed a rash yet... the scent seems to last about 2 days, and people keep telling me that i smell good.
I think i will keep using the Trust stuff i mentioned above for the most part, but this Lush Aromacreme is verrrry nice, and i will definitely use it for special occasions.